Healthy brain, SPECT scan

Healthy brain, SPECT scan

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Caption: Healthy brain. Coloured single photon emission computed tomography (SPECT) scan of an axial (horizontal) section through a healthy human brain. The colours show different levels of activity within the brain tissue, through red (high activity), orange, yellow, green and blue to black (very low activity). SPECT scans use radioactive tracers, injected into the blood, that accumulate in areas of high metabolic activity. The tracer is detected by a gamma camera, allowing the study of active areas. This is useful in diagnosing disorders of brain function, such as Alzheimer's disease.

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Keywords: active, anatomical, anatomy, axial, brain, brain scan, coloured, computed tomography scan, ct scan, false-coloured, healthy, human body, nervous system, neuroimaging, normal, one, radioactive tracer, scanner, section, sectioned, single, single photon emission, spect scan

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